Furnace construction.



No. 773,148. I PATENTED OCT. 25, 1904.

' G. L. JUNGE.

FURNACE CONSTRUCTION.

APPLICATION FILED MAR. 21. 1904.,

N0 MODEL. 3SHEBTS-SHEET 1.

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Geo r PATENTED OCT; 25, 1904. e. L. JUNGB.

FURNACE CONSTRUCTION adz f a v 0 7 W 56/ 4/2? 432/ /7//////// u Z Z w E y UNITEDv STATES Patented October 25, 1904.

PATENT OFFICE,

GEORGE LOUIS JUNGE, OF 'PITTSBURG, PENNSYLVANIA.

FURNACE CONSTRUCTION.

SPECIFICATIQN formingpart of Letters P n 773,148, dated October 25, 1904.

Application filed March 21, 1904:. Serial No. 199,139. (No model.) I

citizen of the United States, residing at the "city of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in. Furnace Construction, of which the following.

is a specification.

In the accompanying drawings, Figure 1 is a vertical section of my improved furnace along the line I I in Fig. 2. Fig. 2 is a horizontal section along the line II II in Fig. 1; and Fig. 3 is a vertical section, on a reduced scale, through one of the side walls of the furnace.

My invention, briefly stated, consists in certain new and useful improvements in furnace construction consisting in novel means for superheating air before the same is admitted to the fire-chamber, thereby greatly aiding combustion and effecting practical smoke consumption. the air-currents from without through tortuous channels in the walls or floor of the furnace and delivering the same into an enlarged supply-chamber adjacent to the combustion or fire chamber, whence it is admitted thereto. I thus am enabled to heat my air, so that it increases rather than retards fuel combustion, and the greater capacity of the supply-chamber relative to the conducting-fines enables the air to expand in heating without a back pressure in said flues. I also prefer to pro vide cross connections through the end wall between the supply-chambers on either side of the fire-chamber, thus enabling both side supply-chambers to supply air to the firechamber though the passage admitting air from the outside into one of said supply-chambers be clogged up.

In the' drawings, which are merely illustrative of my invention and not intended to limit the same to the exact construction shown, 1 is the front wall, 2 2 the side walls, 3 the rear wall, and 4 thefloor, of a furnace of any character. 7

In the drawings I have shown a boiler 5 supported over the furnace; but my improvements are applicable to any form of furnace whatever equally well.

Ieifect this by leading 6 6 are the grate-bars of any usual type, and 7 7 are the cleaning-holes.

In the side walls 2 2 of the furnace I provide channels 8 8,, as shown, so that the air is admitted at the rear of the furnace, as by ports 9, or may be admitted at any other point from the open air or even the ash-pit-and led up, down, and along the walls through said connected passages 8 8 until by means of the warmth of said walls the supply of air is well heated and is finally discharged into supplychambers 10, preferably one in each side wall. The vertical passages or fiues 8 8 in the sidewalls are relatively close together and connected by relatively short horizontal flues at top and bottom into a continuous passage. The vertical fines extend to substantially the top of the combustion-chamber, as shown in dotted lines inFig. 1. Said supply-chambers are relatively larger in capacity than the channels 8 8, so the air in expanding in the process of becoming heated does not tendto retard its passage, but finds room for its increased volume in said chambers 10 10.

10 10.are' ports, locatedeither above or below the grate-bars, as desired. by means of V which the air is led from the supply-chambers 1O 10 to the combustion. or fire chamber 11.

12 12 are chambers or passages in the front wall 1 of the furnace, preferably connecting the supply-chambers 1O 10 in the side walls. I prefer to provide ports from chambers 12 12 into the combustion-chamber 11., either directly, as by ports 13 18, or by means of openings 14 14 into the opening through the front wall of the furnace, for thei roduction of fuel, which is normally closed, y exterior door 15. The floor of the furnace is similarly provided With tortuous passages 16 16, which lead back and forth in the fioor of the furnace, as shown, having inlet air-supply ports 17 17 connecting with the outer air. The air after becoming suitably heated in passages 16 16 is delivered through ports 18 18 into the vertical chamber 19, formed within the bridge wall 20, and is thence discharged either by means of ports 21 21 into'the combustionloo bridge-wall. The bridge-wall is built up, as usual, around the periphery of the boiler and is provided with passage 22 22 to permit the escape of the products of combustion and heated air to the rear of the furnace. The rear wall 3 I prefer to construct in the usual duplex design and provide tie-bricks 23 23 to strengthen the same.

24 is the baffle-Wall, built up around the periphery of the boiler and supported by means of two flanged arched metal members 25 25 of the proper curvature and secured at their extremities in the side walls 2 2 of the furnace.

27 27 are I-beam sections suspended by their upper flanges between the flanges of members 25 25, as shown, from which I-beams are hung a suitable covering of refractory material,-

such as fire-clay tiles. 4

From the above it is evident that the supply of air for the combustion-chamber of my furnace is superheated before reaching said chamber, so that the draft not only accelerates the combustion, but also makes the consumption of the fuel much more complete.

Having described the illustrated application of my invention with great minuteness for the sake of clearness, 1 do not Wish to limit myself thereby; but

I claim, br0adly- 1. In a furnace, side walls and end walls, a combustion-chamber located in the forward portion of said furnace, an air-passage in each of said side walls consisting of relatively long vertical flues and short horizontal connectingflues, said passage terminating in an enlarged chamber within said wall, and outlets from said enlarged chamber into said combustionchamber, substantially as described.

2. In a furnace, side walls and end walls, a combustion-chamber located in the forward portion of said furnace, an air-passage in each of said side Walls consisting of relatively long vertical flues and short horizontal connectingflues, said passage terminating in an enlarged chamber with said wall, an air-passage in the front end Wall of said furnace connecting the enlarged chambers in the side walls and an outlet from said last-mentioned passage into said combustion-chamber, substantially as described. I

Signed at Pittsburg, Pennsylvania, this 19th day of March, 1904.

GEORGE LOUIS J UNGE.

Witnesses:

J. H. HARRISON, EDWARD A. LAWRENCE. 

